Some functions in the script reference (for example, the various GetComponent functions) are listed with a variant that has a letter T or a type name in angle brackets after the function name:
//C# void FuncName<T>(); //JS function FuncName.<T>(): T;
// The type is correctly inferred since it is defined in the function call. //In C# var obj = GetComponent<Rigidbody>(); //In JS var obj = GetComponent.<Rigidbody>();
In C#, it can save a lot of keystrokes and casts:
Rigidbody rb = go.GetComponent<Rigidbody>(); // ...as compared with: Rigidbody rb = (Rigidbody) go.GetComponent(typeof(Rigidbody));
Any function that has a generic variant listed on its script reference page will allow this special calling syntax.